first you need to check your food habbits as per hunger and the way you eat.
if you eat quite often,say every2-3 hourly heavy stubs, and if you eat very fast.
also there are following possibilities you need to concern are-
1) delayed gastric emptying and sluggish liver
function, usually found in sedentary people
2) vitamin B-12 defficiancy with colitis
please cross check cliniacally
get well soon,take care